Abstract Body (Do not enter title and authors here): Background: Percutaneous mitral valve repair has been increasingly utilized for the treatment of mitral valve disease in the recent years, although surgical mitral valve repair and/or replacement remains the preferred therapy, especially for primary mitral regurgitation. Chronic obstructive pulmonary disease (COPD) is a common comorbidity that can adversely affect outcomes of cardiac procedures. While COPD is an independent predictor of adverse outcomes after surgical mitral valve repair, its effects on percutaneous mitral valve repair is not well-defined.

Methods: Using National Inpatient Sample data from 2011 to 2019, we conducted a retrospective study of adult patients with COPD who underwent surgical or percutaneous mitral valve repair, using ICD-9 and ICD-10 codes. We excluded patients with surgical mitral valve replacement. Patient baseline characteristics and in-hospital outcomes were compared and adjusted for covariates to investigate outcomes using a logistic regression model. Statistical significance was determined with a p-value of <0.001.

Results: A total of 18,050 patients with COPD were included. Of these, 10,308 (57.1%) underwent surgical mitral valve repair and 7,742 (42.9%) underwent percutaneous mitral valve repair. The percutaneous cohort had a higher prevalence of heart failure, previous myocardial infarction, pulmonary hypertension, chronic kidney disease, and diabetes, while the surgical cohort had a higher prevalence of obesity and atrial tachyarrhythmias. Percutaneous repair was associated with lower rates of mortality, intraoperative complications, postoperative shock, acute coronary syndrome, and transfusions. Upon logistic regression, percutaneous repair was associated with lower rates of mortality (OR 0.28; 99% CI [0.19-0.40]), acute kidney injury (OR 0.38; 99% CI [0.33-0.44]), pneumothorax (OR 0.14; 99% CI [0.09-0.22]), vascular complications (OR 0.40; 99% CI [0.26-0.62]), and infection (OR 0.54; 99% CI [0.39-0.73]; p<0.001 for all groups).

Conclusions: In patients with COPD, percutaneous mitral valve repair is associated with lower mortality and procedural complications compared to surgical repair. The presence of COPD should be taken into consideration when deciding treatment strategy for patients with mitral valve disease.